STATE COLLEGE, Pa., Sept. 23 (UPI) — The eastern United States could experience a major weather pattern change from drought to drenching as September moves into “Troptober,” forecasters say.

Many areas from Florida to Maine, westward through the Appalachians and into part of the Ohio and Tennessee valleys could experience flooding and disruption to daily activities in the coming weeks, Accuweather.com reported Thursday.

Harmless and even beneficial pockets of rain will break out in the southeastern U.S states, forecasters predict, but then the tropics will take center stage in the weather show.

A barrage of tropical storms is forecast in the Caribbean, Gulf of Mexico and neighboring Atlantic through the first half of October. The storms will threaten parts of the eastern United States.

Repeating downpours could add up to a foot of rain in some locations, forecasters say.

One tropical system alone can drop several inches of rain and erase a drought or abnormally dry pattern in these areas, and there is the potential for several such systems to move northward, Accuweather.com said.